Leases (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 03, 2012	Feb. 26, 2011
Net book values of assets under capital leases and sale-leasebacks
Accumulated depreciation	$ (100,300)	$ (100,561)
Net value	69,375	79,383
Obligations under financing leases	119,108	128,994
Sale-leaseback obligations	7,876	11,303
Less current obligation	(19,977)	(18,003)
Long-term lease finance obligations	107,007	122,295
Minimum payments for Lease Financing Obligations
2013	30,716
2014	22,038
2015	21,522
2016	21,421
2017	19,476
Later years	59,908
Total minimum lease payments	175,081
Amount representing interest	(48,097)
Present value of minimum lease payments	126,984
Minimum payments for Operating Leases
2013	1,002,062
2014	966,754
2015	913,521
2016	854,717
2017	784,330
Later years	4,304,798
Total minimum lease payments	8,826,182
Land
Net book values of assets under capital leases and sale-leasebacks
Gross value	6,695	7,528
Buildings
Net book values of assets under capital leases and sale-leasebacks
Gross value	142,483	148,262
Leasehold improvements
Net book values of assets under capital leases and sale-leasebacks
Gross value	1,236	1,639
Equipment
Net book values of assets under capital leases and sale-leasebacks
Gross value	$ 19,261	$ 22,515